Physics Instruments

The four gap bridge has a large and heavy copper strip of (SWG) No. 18) mounted on a heavy 3/4”thick laminated base of size 44”x 4” x 3/4”. /nine heavy brass terminals lock type are provided to reduce the resistance to a minimum . The ends gaps are closed by removable brass binding pieces which are held in position by the terminals. The 24 SWG constantan wire is stretched along the top of wooden meter scale and securely clamped to the brass end strips so that end errors are negligible. Supplied complete with pencil jockey along with lead for connections. .

Routine quality made from soft wood.
Cat. No. Description
1) One meter long
2) Half meter long

Double scale, both edges divided in millimeters figured centimeters, opposite direction reading facility. Made of very superior quality, Seasoned Wood. Cat. No. Description 1) One meter long 2) Half meter long

This big sized demo - model is very effective in teaching large groups of students. The original model was designed and perfected by the physics department of Modern High School, Cicero, Illinois, where it is valuable teaching aid. Approx. Length = 8”, made from aluminum, black spray painted.

25 mm model for the quality conscious. The screws are of hardened stainless steel with ground threads and locking arrangements. Packed in velvet lined case.
Cat. No. Description
1) 25x 1 mm
2) 25 x ½ mm

The barrel and yoke are both nickel plated and the rod is made from rust proof stainless steel. Individually packed in a beautiful cardboard box with detailed working manual.

Cat. No.	Description
a)	15x 1 mm
b)	20x 1 mm
c)	25x 1 mm
d)	15 x ½ mm
e)	20 x ½ mm
f)	25 x ½ mm.

This economical instrument is sufficiently accurate for beginners and for most elementary laboratory measurements. Superior quality, semi circular Welch pattern, dull nickel finish, oxidized threaded rod, individually packed in card board box, with detailed working manual.

Cat. No.	Description
a)	15x 1 mm
b)	20x 1 mm
c)	25x 1 mm
d)	15 x ½ mm
e)	20 x ½ mm
f)	25 x ½ mm.

Fitted in plastic frame.
A Single 4x.
B Double 7x.
C Triple 10x.

Wooden, to take lens or mirrors upto 75mm dia. comprising an upright 100mm high, with V slot to hold a convex or concave lens.

Simple wooden block 50x50x50mm with slot to take mirrors. .

Simple wooden block 50x50x50mm with slot to take mirrors.

Back silvered, with protective coating.
Cat. No. 1132
A 75x25mm
B 75x50mm
C 100x75mm
D 150x25mm
E 150x50mm
F 100x50mm
G 150x75mm
H 150x100

It gives IC regulated D.C. Output 0-300 volt continuously variable to be applied to condenser plates and a 6 volt at 3A A.C. supply for the lamp house.

The principal elements of the assembly are a specially designed condenser, a light source and a measuring microscope. All are mounted on a common support. Consists of a heavy cast iron base which is mounted on a steel pillar that carries the microscope and the lamp house. The microscope can be adjusted smoothly by slow motion screws in the horizontal as well as in the vertical direction. An automizer is also fitted on the same carriage. The apparatus does not need any critical adjustment and the oil drops appear in microscope within seconds. The microscope is provided with a micro meter scale.

The charge is transferred from generator to the metallic dome surrounding the upper pulley, with the help of the motor driven rubber belt and two metallic combs. Complete with a 10cm diameter discharge sphere. Complete with accessories kit containing Faraday Pail, Bouncing Ball, Head of Hair, Charge Attrator and Icons in Motion Simulator. Spare Belt